[postgis-users] How to get the centroid of an bounding box using st_extent

[Charlie Savage]

> PostgreSQL will rewrite Centroid(Extent()) to Centroid(Box2Geom(Extent())

Right.  I was thinking more about how you would change Box2Geom to 
recognize the extent is actually a point (being wary of comparing 
floating point numbers).

Charlie
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